Hi there, we noticed high volume of 410 responses from APNs.
It started on July 19th and we see it across multiple apps. Is there some sort of mass token invalidation/removal that's happening on APNs?
The start of returning 410 for tokens that can be determined as no longer active has always been on a fuzzy schedule, if and when the system decides to return this status. Based on ongoing feedback about it, we recently twisted some knobs and re-tuned the logic that determines 410 status will be returned for an inactive token.
That is why you are seeing this sudden spike in 410 returns. While we believe the spike will settle down to some level (could be different for each app depending on various patterns), in general, ongoing, you may expect the 410 status rate somewhat higher than you may have observed before.
